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Seq i/'iia $19 Striker Avenue,Suite 8 - <br /> „ �.4t LY Sacrarrer.±o, CA 95834 <br /> (916)921-9600 <br /> FAX equa 921-.100 <br /> Analytical <br /> 1� www.squola[abs,cam <br /> Wta Environmental C4nsultantS(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 05/01/01 13:08 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air (ppmv) by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units . Dilution Batch Prepared Analyzed Method Nates <br /> INF Total Air(5104304-01)Air Sampled: 04/2310107:52 Received:04/23/0110:42 <br /> Purgeable Hydrocarbons 449 120 . ppmv 50 1040352 04/26/01 04/26/01 DHS LUFT P-02 <br /> Benzene ND 0.800 <br /> Toluene 2.30 0.650 <br /> Ethylbenzene 13.6 0.600 <br /> Xylenes(total) 84.4 0.600 " <br /> Methyl tert-butyl ether ND 7.00 <br /> Surrogate:a,a,a-Tris luorotoluene� 102% 60-140 " <br /> TNF CAT Air(5104304-02)Air Sampled:04123/0107-50 Received: 04/23/01 10:42 <br /> Purgeable Hydrocarbons 408 24.0 ppmv 10 1040352 04/26/01 04/26/01 DHS LUFT P-02 <br /> Benzene ND 0.160 <br /> Toluene 1.24 0.I30 <br /> Ethylbenzene 11.2 0.120 <br /> Xylenes(total) 68.7 0.120 " <br /> ethyl tert-butyl ether ND I.40 <br /> gate: a,a,a-Trifluorotoluene 9$.0% 60-140 " <br /> EFF Air(5104304-03)Air Sampled: 04/23/0107:48 Received: 04/23/01 10:42 <br /> Purgeable Hydrocarbons ND 2.40 ppmv 1 1040352 04/26/01 04/26/01 DHS LUFT <br /> Benzene ND 0.0160 " <br /> Toluene ND 0-0130 <br /> Ethylbenzene 0.0156 0.0120 <br /> Xylenes(total) 0.158 0.0120 " <br /> Methyl tert-butyl ether ND 0.140 " « <br /> Surrogate:a,a,a-Trifluorotoluene 90.0% 60-140 <br /> Sequoia Analytical- Sacramento <br /> �l Y The results in this report apply to the samples analyzed in accordance with the chain of <br /> . custody document.This analytical report must be reproduced in its entirety. <br /> Page 3 of 6 <br />